Rotating TIFFS - they go black!

[PaulWright]

Hi Chris,

Suddenly I have a change in behavior of TIFFS displaying in BBPro.

Until a couple of days ago, TIFFS that I rotated in Bridge displayed in BBPro as unrotated. Now they show as black. Is there a checkbox somewhere that has unchecked itself?

It has mystified me since BBPro first shipped why I can't rotate TIFFS. I keep an old version of BB Classic just to do rotates, or do them in Bridge.

Thanks & regards,
Paul Wright

[Chris Breeze]

The graphics library used by BBPro doesn't support the rotating of TIFFs because it is extremely difficult to support all the myriad variants of TIFFs (e.g. TIFFs containing layers, JPEG compressed images etc.).

The code for rotating TIFFs in BreezeBrowser was written 5 years ago when TIFFs were somewhat simpler and works by loading the image, rotating the data and rewriting it. The problem with this approach is data will be lost from complex TIFFs (e.g. layers will be flattened, compressed TIFFs are rewritten as uncompressed).

I don't know if there is a switch in Bridge which might be causing the problem. Bridge appears to rotate TIFFs using the EXIF orientation. Currently BBPro ignores EXIF orientation in TIFFs because at the time I wrote the code Photoshop and other apps also ignored it. If Adobe are now supporting the rotation of TIFFs using the EXIF orientation tag it may be time to add this in BBPro.

[PaulWright]

How about a switchable option in the next release that allows rotation of tiffs with the appropriate warning message? This would be SO useful. It's nuts switching to another app just to rotate.

99% of the tiffs I want to rotate in BBPro are single layer uncompressed tiffs.

Thanks,
Paul